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3M Acryl Marine Putty is recommended for filling pin holes, scratches and other surface defects on hulls. White marine putty that spreads easily and reduces chance of putty being visible through the final finish coat. Fast drying, easily sanded with low shrinkage.
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Is it ok to use this in tiny holes in topside gelcoat, where fiberglass is visible. Will it adhere to gelcoat and prevent water from getting in to fiberglass?
It would seal the small holes and work well in that application.
can this product be used on painted surfaces?
Yes, it can be used on most marine paints such as enamels and single part polyethylene's. It sands easily and is easy to use with no mixing.
Yes, I sanded everything first to remove any loose paint. The 3M product came next. It filled in all the spider and hairline cracks on my surface. After sanding, undercoat first, then apply two top coats. The dried 3M product will be more porous than the previously painted areas. The primer takes care of that.Peter
Thank you for your question. The 3M Acrylic Marine Putty is an excellent medium duty fairing putty. It is excellent for fairing surface imperfections such as chipped paint, dings and depressions on the hull.It can be applied to a previously painted surface but you MUST be sanded and roughed up so that the filler will adhere
I think so, I have used it on primer coated surfaces and it adheres well.
sorry - not sure. I use this to repair an epoxy surfboard... i would guess yes, but can not confirm this for you.
I am prepping my '72 Formula 233c for a new paint job. Although the hull is in fantastic condition, I did have a number of shallow scratches and pin holes. This stuff works great at easily filling those in. I used a cheap flat edge putty knife to spread the material over the blemish and flatten it out. Once it dries it sands right out. The consistency is just right where it is soft and very pliable yet it sticks where you want and doesn't run or drip.
North of Boston
Great for smaller defects
Used to fill in extensive pole rash scratches on hull. Blends butifully with my white hull. Fills voids in gell coat in cockpit. May need a few applicatios to fill deeper cuts. Easy to sand out. After 3 years, still perfect. Excellent stuff!
Atlantic Highlands, NJ
This product is great. I started a boat repaint project and started with Evercoat and it sets up way to fast. This product gives you up to 10 minutes depending on the climate. This is a one part product so just squeeze the tube and start fairing... I wish I would have used 3M first on my project.
Excellent for minor to moderate scratchs
Beats bondo cream scratch filler by a long shot. We use this product in our bathtub preparation before reglazing. For minor to moderate cuts and gouges it works great. Do not try to use it for deep holes or cuts. Surface dries but won't completely dry in filled holes more than 1/8 of an inch deep. Sands very well and smoothes out nicely. Easy to spread. Larger tube than I thought so that was a nice surprise. This has been recommended to the PBRA members. (Professional Bathtub Refinishers Assoc.)